Of those, 5 is not composite.
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The numbers 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39 and 40 are composite (including the boundaries).
21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39
The composite numbers between 1 and 39 are: 4 6 8 9 10 12 14 15 16 18 20 21 22 24 25 26 27 28 30 32 33 34 35 36 38
20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40
20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40